CN102953549A - Novel quick tensioning construction method for front-blocked jack - Google Patents
Novel quick tensioning construction method for front-blocked jack Download PDFInfo
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- CN102953549A CN102953549A CN2011102532790A CN201110253279A CN102953549A CN 102953549 A CN102953549 A CN 102953549A CN 2011102532790 A CN2011102532790 A CN 2011102532790A CN 201110253279 A CN201110253279 A CN 201110253279A CN 102953549 A CN102953549 A CN 102953549A
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Abstract
The invention relates to a novel quick tensioning construction method for a front-blocked jack. The novel quick tensioning construction method is applicable to the tensioning construction of a bridge pre-stressed projects in traffic engineering (such as bridge engineering, railway engineering, highway engineering and municipal engineering) and pre-stressed structure projects in the building industry. According to the novel quick tensioning construction method for the front-blocked jack, a steel strand in a beam is tensioned by the front-blocked jack. The novel quick tensioning construction method for the front-blocked jack is characterized by comprising the following steps: sequentially mounting working clips on steel strand bundles on the beam; fastening and positioning the working clips; then mounting limiting plates which are matched in diameter on the steel strands; mounting a lengthening sleeve, the front-blocked jack and tool clips; quickly tensioning; and returning oil and releasing. The novel quick tensioning construction method for the front-blocked jack combines the advantages of various domestic construction technologies based on front-blocked jacks and rear-blocked jacks, and is simple, safe, quick, efficient, environmentally friendly and energy-saving, greatly improves the production efficiency, reduces the construction cost, and reduces the construction period.
Description
Technical field
The present invention relates to novel front clip type jack quick tensioning job practices and be adapted to different types of rridges, in the stretching construction of the bridge prestress engineering of the traffic engineering such as railway, highway, municipal administration and the prestressed structure engineering of builing industry.
Background technology
The domestic prestress tensioning equipment for Engineerings such as traffic, buildings of China mostly is traditional rear clip type jack, and the steel strand that expose are longer, and cost is high, waste is large.Clip type jack before the minority of the domestic appearance of present China: the anchor hole center to center distance that has can not adapt to existing work anchor too greatly, and application is limited to very much; The bad loading and unloading of some manufacturabilities are inconvenient, therefore widely applied.
Summary of the invention
In order to remedy the deficiencies in the prior art, invention provides a kind of material and high novel front clip type jack quick tensioning job practices of efficient of saving.
Invention is achieved by the following technical solution:
A kind of novel front clip type jack quick tensioning job practices, with the tension of the steel strand of beam inside, its job practices comprises by jack, its processing step is as follows:
One, the fast blanking of steel strand, lashing: adopt CSJ15-1A type Novel steel strand pulling machine that bridge is carried out lashing and blanking steel strand;
Two, clip type jack accessory before the Fast Installation
1. installation work intermediate plate: work clip sheet is installed in steel strand and with fastening;
2. mounting limit plate: the limiting plate that will be complementary with the steel strand diameter, accurate contraposition is installed;
Three, clip type jack before the Installation of New Type: first the stretch-draw oil circuit of oil pump is connect the pressure meter that this jack tension chamber oil nozzle demarcated simultaneously and also receive this oil circuit, oil pump backhaul oil circuit connects the backhaul oil nozzle of this jack, and the safety valve of this oil circuit transferred to 10MPa, then clip type jack is to stretching notch before utilizing the hoisting frame that is fixed on the prefabricated case beam to promote, and rapid-aligning is installed;
Four, fast fixing tool anchor: but with bearing pin and draw-in groove slightly gyration make it be in connection status, can finish the installation of moveable anchor;
Five, erecting tools intermediate plate: will shift to an earlier date ready tool clamping piece and install fastening in place;
Six, quick tensioning: open switch stretch-draw oil circuit fuel feeding hydraulic oil and be filled with the stretch-draw oil pocket, it is that cylinder body outwards moves that the promotion cylinder body advances, and the hydraulic oil of simultaneously backhaul oil circuit flows into by the backhaul oil circuit in the fuel tank of oil pump, and the backhaul oil circuit of this moment must be open mode;
Seven, the oil return pine opens; Open oil return switch backhaul oil circuit fuel feeding, the oil return of stretch-draw oil circuit, hydraulic oil is filled with the backhaul oil pocket, promotes cylinder body and retreats retraction, and the hydraulic oil of simultaneously backhaul oil circuit flows into by the stretch-draw oil circuit in the fuel tank of oil pump, and the stretch-draw oil circuit of this moment must be open mode;
Eight, moveable anchor moves back anchor, dismounting fast; Tool clamping piece, moveable anchor, front clip type jack, limiting plate are dismantled successively;
Nine, enter next operation circulation; With tool clamping piece, moveable anchor, front clip type jack, limiting plate are put well successively under the dismounting, prepare to enter next operation circulation.
The novel front clip type jack quick tensioning job practices of the present invention; Be installed in first on the steel strand accessory installation work intermediate plate on the novel front clip type jack and mounting limit plate respectively, and then successively clip type jack, moveable anchor, tool clamping piece before the Installation of New Type, after all installing, quick tensioning is stretching with steel strand, then the oil return pine opens, the moving back fast anchor and device therefor and workpiece disassembled of moveable anchor, for next bridge with preparing.
This processing step also includes the installation that transition lengthens cover, and transition lengthens cover and is mainly used in the cave anchor of railway beam, and non-cave anchor can omit this part, and transition lengthens cover and can install in advance, namely installs before the clip type jack before Installation of New Type.
The moveable anchor of clip type jack is to make by the 45# Steel material that the ionic nitriding Technology for Heating Processing is heat-treated before being somebody's turn to do, its compliance is extensive, can be adapted to all working anchor and easily move back anchor, anyly move back the anchor agent and just can easily move back fast anchor in the situation that do not use; The positioning sleeve of jack adopts the bearing pin card slot type to be connected with gland, because positioning sleeve adopts the bearing pin card slot type to be connected with gland, and positioning sleeve easy accessibility, fast handling instrument anchor.Change the moveable anchor specification convenient and swift, when needs are changed moveable anchor, only need to bearing pin and draw-in groove slightly gyration (being in detachable state) can take out positioning sleeve, then directly take out moveable anchor, change very quick.After changing moveable anchor, again bearing pin and draw-in groove are in the clamping state, can finish the installation of moveable anchor, not only convenient but also quick, effectively improved operating efficiency.
The advantage of this job practices is mainly reflected in following several respects
1, novel front clip type jack quick tensioning construction: the placement of front clip type jack is opposite with rear cassette, and piston is near work anchor, and moveable anchor is contained in jack inside, when stretch-draw, piston is motionless, and it is mobile that cylinder part drives the punching cover, moves and carries out stretch-draw thereby drive moveable anchor.Because the moveable anchor of novel front clip type jack is inner at jack, shortened the distance of itself and work anchor, so not only accelerated the activity duration of stretch-draw but also saved steel strand that (every end saves approximately 0.4～0.5m).
2, the anchor technology of moving back fast of moveable anchor: the moveable anchor of this front clip type jack is to make by the 45# Steel material that the ionic nitriding Technology for Heating Processing is heat-treated, its compliance is extensive, can be adapted to all working anchor and easily move back anchor, anyly move back the anchor agent and just can easily move back fast anchor in the situation that do not use.
3, the rapid-aligning lashing technology of moveable anchor: moveable anchor is inner by the step power transmission at the punching cover, and can arbitrarily rotate, and can not change its front and back position as being threaded, and therefore lashing is convenient in very convenient and work anchor contraposition.
4, the quick loading, unloading of moveable anchor, replacing technology: because positioning sleeve adopts the bearing pin card slot type to be connected with gland, positioning sleeve easy accessibility, fast handling instrument anchor.Change the moveable anchor specification convenient and swift, when needs are changed moveable anchor, only need to bearing pin and draw-in groove slightly gyration (being in detachable state) can take out positioning sleeve, then directly take out moveable anchor, change very quick.After changing moveable anchor, again bearing pin and draw-in groove are in the clamping state, can finish the installation of moveable anchor, not only convenient but also quick, effectively improved operating efficiency.
5, overcome the difficult problem of stretch-draw insufficient space: during tensioning construction between the cast-in-situ box girder and prefabricated case beam of railway or bridges in highway engineering, between cast-in-situ box girder and the cast-in-situ box girder (containing continuous girders by suspension grouting), because of the stretch-draw insufficient space, traditional rear cassette generally only has 0.6～0.8m, and front cassette space is up to 1.8m, and novel front clip type jack can overcome the shortcoming of stretch-draw insufficient space.
Novel front clip type jack quick tensioning job practices, combine the advantage of domestic various forward and backward clip type jack construction technologies, job practices is simple and easy, safe, fast, efficient, environmental protection, energy-conservation, has greatly improved production efficiency, save engineering cost, shortened the construction period.
Description of drawings
Below in conjunction with accompanying drawing invention is further described:
Fig. 1 is the structural representation of the technological process of invention;
Fig. 2 is structure and the accessory figure of used front clip type jack in the technological process of invention.
Among the figure, 1. bonnet; 2. gland; 3. punching cover; 4. positioning sleeve; 5. piston; 6. cylinder body; 7. tool clamping piece; 8. work anchor ring; 9. moveable anchor; 10. protecgulum; 11. lengthen cover; 12 limiting plates; 13. work clip sheet.
The specific embodiment
It below is a kind of specific embodiment of invention.Used novel kilocalorie of jack is comprised of bonnet 1, gland 2, punching cover 3, positioning sleeve 4, piston 5, cylinder body 6, tool clamping piece 7, moveable anchor 9 and protecgulum 10 in this processing step, used accessory comprises lengthening cover 11, limiting plate 12, work clip sheet 13 and work anchor ring 8, and wherein lengthening cover is the apolegamy part.
This embodiment comprises that processing step is as follows:
One, the fast blanking of steel strand, lashing
Adopt CSJ15-1A type Novel steel strand pulling machine that bridge is carried out lashing and blanking steel strand.
Two, clip type jack accessory before the Fast Installation
1. the installation work intermediate plate 13: work clip sheet 13 is installed in steel strand also with fastening;
2. the mounting limit plate 12: the limiting plate 12 that will be complementary with the steel strand diameter, and accurate contraposition is installed;
3. transition is installed lengthens cover 11:
Three, front clip type jack is installed
The stretch-draw oil circuit of oil pump connects the pressure meter that this jack tension chamber oil nozzle demarcated simultaneously and also receives this oil circuit, oil pump backhaul oil circuit connects the backhaul oil nozzle of this jack, and the safety valve of this oil circuit transferred to 10MPa, then clip type jack is to stretching notch before utilizing the hoisting frame that is fixed on the prefabricated case beam to promote, and rapid-aligning is installed;
Four, the fast fixing tool anchor 9
But with bearing pin and draw-in groove slightly gyration make it be in connection status, can finish the installation of moveable anchor 9;
Five, the erecting tools intermediate plate 7
To shift to an earlier date ready tool clamping piece 7 installs fastening in place.
Six, quick tensioning:: open switch stretch-draw oil circuit fuel feeding hydraulic oil and be filled with the stretch-draw oil pocket, it is that cylinder body outwards moves that the promotion cylinder body advances, the hydraulic oil of simultaneously backhaul oil circuit flows into by the backhaul oil circuit in the fuel tank of oil pump, and the backhaul oil circuit of this moment must be open mode;
Seven, the oil return pine opens; Open oil return switch backhaul oil circuit fuel feeding, the oil return of stretch-draw oil circuit, hydraulic oil is filled with the backhaul oil pocket, promotes cylinder body and retreats retraction, and the hydraulic oil of simultaneously backhaul oil circuit flows into by the stretch-draw oil circuit in the fuel tank of oil pump, and the stretch-draw oil circuit of this moment must be open mode;
Eight, moveable anchor moves back anchor, dismounting fast; Tool clamping piece 7, moveable anchor 9, front clip type jack, limiting plate 12 are dismantled successively;
Nine, enter next operation circulation; Tool clamping piece 7, moveable anchor 9, front clip type jack, limiting plate 12 are dismantled successively under the dismounting put well successively, prepare to enter next operation circulation.
Mark logical bridge (2008) the 2322A series 31.5m of deep and clear river grand bridge and 23.5m case beam 582 Pin as example take large western railway road Line for Passenger Transportation III, 450 Pin have now been produced, every Pin prefabricated case beam has 27 prestressed stretch-draw ducts, every end in each duct is saved steel strand length and is considered cost-saved 63.375 ten thousand yuan altogether according to 0.4m.
Save the quantity of steel strand: G=(26 holes * 9 piece+1 hole * 12 piece) * 0.8m * 1.101/1000 * 450 Pin=97.5t (steel strand)
The cost of saving: ten thousand yuan of 97.5t * 6500 yuan/t=63.375.
Claims (5)
1. novel front clip type jack quick tensioning job practices, by the steel strand tension of jack with beam inside, its job practices comprises, its processing step is as follows:
One, the fast blanking of steel strand, lashing: adopt CSJ15-1A type Novel steel strand pulling machine that bridge is carried out lashing and blanking steel strand;
Two, clip type jack accessory before the Fast Installation
1. installation work intermediate plate (13): work clip sheet (13) is installed in steel strand and with fastening;
2. mounting limit plate (12): will install with limiting plate (12) accurate contraposition that the steel strand diameter is complementary;
Three, install before clip type jack: the stretch-draw oil circuit of oil pump connects the pressure meter that this jack tension chamber oil nozzle demarcated simultaneously and also receives this oil circuit, oil pump backhaul oil circuit connects the backhaul oil nozzle of this jack, and the safety valve of this oil circuit transferred to 10MPa, then clip type jack is to stretching notch before utilizing the hoisting frame that is fixed on the prefabricated case beam to promote, and rapid-aligning is installed;
Four, fast fixing tool anchor (9): but with bearing pin and draw-in groove slightly gyration make it be in connection status, can finish the installation of moveable anchor (9);
Five, erecting tools intermediate plate: will shift to an earlier date ready tool clamping piece and install fastening in place;
Six, quick tensioning: open switch stretch-draw oil circuit fuel feeding hydraulic oil and be filled with the stretch-draw oil pocket, it is that cylinder body outwards moves that the promotion cylinder body advances, and the hydraulic oil of simultaneously backhaul oil circuit flows into by the backhaul oil circuit in the fuel tank of oil pump, and the backhaul oil circuit of this moment must be open mode;
Seven, the oil return pine opens; Open oil return switch backhaul oil circuit fuel feeding, the oil return of stretch-draw oil circuit, hydraulic oil is filled with the backhaul oil pocket, promotes cylinder body and retreats retraction, and the hydraulic oil of simultaneously backhaul oil circuit flows into by the stretch-draw oil circuit in the fuel tank of oil pump, and the stretch-draw oil circuit of this moment must be open mode;
Eight, moveable anchor moves back anchor, dismounting fast; Tool clamping piece (7), moveable anchor (9), front clip type jack, limiting plate (12) are dismantled successively;
Nine, enter next operation circulation; With tool clamping piece (7), moveable anchor (9), front clip type jack, limiting plate (12) are put well successively under the dismounting, prepare to enter next operation circulation.
2. novel front clip type jack quick tensioning job practices according to claim 1 when secret service skill step also is included in the front clip type jack accessory of Fast Installation, is installed transition and is lengthened cover (8) behind the mounting limit plate.
3. novel front clip type jack quick tensioning job practices according to claim 1, the used tool anchor is to make by the 45# Steel material that the ionic nitriding Technology for Heating Processing is heat-treated in its processing step; Can be adapted to all working anchor (8) and in the situation that do not use and anyly move back the anchor agent and easily move back fast anchor.
4. novel front clip type jack quick tensioning job practices according to claim 1, the positioning sleeve of used jack (4) adopts the bearing pin card slot type to be connected with gland (2) in its processing step.
5. novel front clip type jack quick tensioning job practices according to claim 1, used novel kilocalorie of jack is comprised of bonnet (1), gland (2), punching cover (3), positioning sleeve (4), piston (5), cylinder body (6), tool clamping piece (7), moveable anchor (9) and protecgulum (10) in its processing step, and used accessory comprises lengthening cover (11), limiting plate (12), work clip sheet (13), work anchor ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110253279.0A CN102953549B (en) | 2011-08-30 | 2011-08-30 | Novel quick tensioning construction method for front-blocked jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110253279.0A CN102953549B (en) | 2011-08-30 | 2011-08-30 | Novel quick tensioning construction method for front-blocked jack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102953549A true CN102953549A (en) | 2013-03-06 |
| CN102953549B CN102953549B (en) | 2015-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110253279.0A Expired - Fee Related CN102953549B (en) | 2011-08-30 | 2011-08-30 | Novel quick tensioning construction method for front-blocked jack |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225403A (en) * | 2013-05-10 | 2013-07-31 | 史东生 | Method for installing elastic supporting and lifting devices by adopting prestressing technique |
| CN105422131A (en) * | 2015-12-28 | 2016-03-23 | 上海市机械施工集团有限公司 | Longitudinal tensioning device for shield segment and using method of longitudinal tensioning device |
| CN106809759A (en) * | 2017-03-02 | 2017-06-09 | 湖南联智智能科技有限公司 | A kind of preceding clip type jack from dynamometry value |
| CN117486114A (en) * | 2024-01-03 | 2024-02-02 | 河南丽卡数控设备有限公司 | Multi-hole front clamping jack |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108103946B (en) * | 2017-12-21 | 2019-04-16 | 中国十九冶集团有限公司 | Tensioning device applied to small space construction |
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| JPH09217493A (en) * | 1996-02-14 | 1997-08-19 | Abe Kogyosho:Kk | Device for automatic tension system for pc structure |
| CN2460241Y (en) * | 2000-11-13 | 2001-11-21 | 柳州欧维姆建筑机械有限公司 | Jack for single prestressed reinforcing steel stretch-draw |
| CN101397851A (en) * | 2008-10-24 | 2009-04-01 | 上海建科建设发展有限公司 | Construction regulation means of prestressing force steel construction stretching end cable force |
| CN201635028U (en) * | 2009-09-11 | 2010-11-17 | 李树颜 | Retrogradation restricting device for one-way road |
| CN102003072A (en) * | 2010-10-08 | 2011-04-06 | 天津滨海盈信投资有限公司 | Steel strand bundle-weaving and crossing construction method |
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2011
- 2011-08-30 CN CN201110253279.0A patent/CN102953549B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09217493A (en) * | 1996-02-14 | 1997-08-19 | Abe Kogyosho:Kk | Device for automatic tension system for pc structure |
| CN2460241Y (en) * | 2000-11-13 | 2001-11-21 | 柳州欧维姆建筑机械有限公司 | Jack for single prestressed reinforcing steel stretch-draw |
| CN101397851A (en) * | 2008-10-24 | 2009-04-01 | 上海建科建设发展有限公司 | Construction regulation means of prestressing force steel construction stretching end cable force |
| CN201635028U (en) * | 2009-09-11 | 2010-11-17 | 李树颜 | Retrogradation restricting device for one-way road |
| CN102003072A (en) * | 2010-10-08 | 2011-04-06 | 天津滨海盈信投资有限公司 | Steel strand bundle-weaving and crossing construction method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225403A (en) * | 2013-05-10 | 2013-07-31 | 史东生 | Method for installing elastic supporting and lifting devices by adopting prestressing technique |
| CN103225403B (en) * | 2013-05-10 | 2015-07-15 | 史东生 | Method for installing elastic supporting and lifting devices by adopting prestressing technique |
| CN105422131A (en) * | 2015-12-28 | 2016-03-23 | 上海市机械施工集团有限公司 | Longitudinal tensioning device for shield segment and using method of longitudinal tensioning device |
| CN105422131B (en) * | 2015-12-28 | 2018-07-06 | 上海市机械施工集团有限公司 | The device and its application method longitudinally tensed for shield duct piece |
| CN106809759A (en) * | 2017-03-02 | 2017-06-09 | 湖南联智智能科技有限公司 | A kind of preceding clip type jack from dynamometry value |
| CN117486114A (en) * | 2024-01-03 | 2024-02-02 | 河南丽卡数控设备有限公司 | Multi-hole front clamping jack |
| CN117486114B (en) * | 2024-01-03 | 2024-03-05 | 河南丽卡数控设备有限公司 | Multi-hole front clamping jack |
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| Publication number | Publication date |
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| CN102953549B (en) | 2015-03-18 |
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Effective date of registration: 20161017 Address after: 210023, A6 building, Purple East International Creative garden, No. 2 Purple East Road, Qixia District, Jiangsu, Nanjing Patentee after: China Railway Tenth Bureau Group Fourth Engineering Co.,Ltd. Address before: 250101 Shandong city in Ji'nan Province, Lixia District (the New District) Shun Tai Plaza No. 7 Patentee before: China Railway Tenth Group Co.,Ltd. |
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Granted publication date: 20150318 |
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